In 1989, Emperor Hirohito of Japan died in Tokyo at age 87; he was succeeded by his son, Crown Prince Akihito.

In 1999, for the second time in history, an impeached American president went on trial before the Senate. President Bill Clinton faced charges of perjury and obstruction of justice; he was acquitted.

Ten years ago: President George W. Bush proposed legal status, at least temporarily, for millions of immigrants improperly working in the U.S. Swedish actress Ingrid Thulin died in Stockholm at age 77.

Five years ago: President-elect Barack Obama met at the White House with America's four living presidents: George W. Bush, George H.W. Bush, Bill Clinton and Jimmy Carter. Russia shut off all its gas supplies to Europe through Ukraine in a price and payment dispute; the cutoff lasted nearly two weeks.

One year ago: President Barack Obama announced he would nominate former GOP Sen. Chuck Hagel as his next defense secretary, calling him “the leader our troops deserve”; Obama also chose White House counterterrorism adviser John Brennan to lead the Central Intelligence Agency. The No. 2 Alabama Crimson Tide rolled top-ranked Notre Dame 42-14 for the BCS championship.